Electric machine gun



Jan. 29, 1963 1 c. A. STOCKHOLM 3 ELECTRIC MACHINE GUN Filed 061;. 11, 1960 3 Sheets-s l INVENTOR 624M411. JMJa/zzz ea TTORNEYs Jan. 29, 1963 c. A. STOCKHOLM ELECTRIC MACHINE GUN INVENTOR ATTORNEYS IN m my I I.

III-VI il I 5 Sheets-Sheet 2 {jaws/1T. J'Zwfla/m Filed Oct. 11, 1960 Jan. 29, 1963 c. A. STOCKHOLM 3,075,433

ELECTRIC MACHINE GUN Jiarkad. Shaikh! zTToRNE 3 Sheets-Sheet 3 Filed Oct. 11, 1960 United rates atent fifice 3,d75, i33 Patented Jan. as, teen 3,675,433 ELEETRIC MAEEEJE GUN Charles A. tocithoim, Rte. 1, PD. Box 948,

Beaumont, Tex. Filed Get. 11, teen, der. No. 62,034- 9 Ciaims. (Ci. 89-13) The present invention relates in general to rapid-fire rotary magazine weapons, and more particularly to electrically activated, rotary magazine machine guns having means for remote control of the firing, and adjustment of the elevation thereof.

An object of the present invention is the provision of a novel rapid-fire rotary magazine machine gun adapted to be mounted on the hood or at some similar external location on vehicles operated by law-enforcement ofiicers and electrically fired by a switch means remote from the gun.

Another object of the present invention is the provision of a novel electrically activated firing and magazine indexing mechanism for rotary magazine machine guns.

Another object of the present invention is the provision of a novel rotary magazine electrically fired machine gun to be mounted on the hood of an automobile having a remote firing push button on the dashboard of the automobile or by a hand switch associated with an extension cord which may be plugged into suitable jack means at the automobile.

Another object of the present invention is the provision of novel remote control firing and elevation aiming instrumentalities for activation of electrical circuitry to fire a rotary magazine machine gun and index the magazine, and for adjusting the elevation of the machine gun.

Other objects, advantages and capabilities of the invention will become apparent from the following detailed description of a preferred practical embodiment thereof taken in conjunction with the accompanying drawings:

In the drawings:

FIGURE 1 is a side elevation of an electric machine gun constructed in accordance with the present invention, mounted in position on an automobile, parts being'broke'n away to reveal the location of the control means for the externally mounted machine gun;

FIGURE 2 is a top plan view showing the machine gun and dashboard controls, taken from the line 2-2 of FIGURE 1; 7

FIGURE 3 is an'electric schematic diagram of the electrical control circuit for the machine gun;

FIGURE 4 is a longitudinal vertical view of the" machine gun and its mount, taken from the line 44- of FIGURE 2;

FIGURE 5 is a vertical, transverse section view taken along'the line 5-5 of FIGURE 4;

FIGURE 6 is a rear elevation of the machine gun; FIGURE 7 is a side elevation of the machine gun; FIGURE 8 is a side elevation view of a portable handle unit for transporting the machine gun;

FIGURE 9 is a fragmentaryflat development of the pattern of the indexing track on the periphery of the rotary magazine; and

FIGURE 10 is a sectionview taken along the line Ida-Ii) of FIGURE 5.

Referring to the drawings, wherein like reference characters designate corresponding parts throughout the'sev eral figures, the electric machine gun of the present invention, indicated generally by the reference character lit, is designed to be mounted at an exterior position on a vehicle, such as on the hood of law-enforcement ofiicers patrol cars and the like as illustrated in FIGURE 1, and

is arranged so as to be fired from a push button switch;

indicated generally by the reference character 11 located on the dashboard 12 at aposition readily accessible to the driver.

The machine gun lti is of the rotary magazine type which is adapted to be electrically fired and indexed, the details of construction of the machine gun being illustrated more clearly in FIGURES 4 through 10. Machine gun 10 comprises an elongated rifled barrel 13 removably mounted at its rear end in a receiver block 14 having an upper portion 15 which mounts a pivot pin 16 on which the cylindrically shaped magazine 17 is mounted for rotation about its center. The rear end of the pivot pin 16 is housed in a suitable aperture in a breech block 18 which is of rectangular configuration in rear elevation and covers only the central region of the rear face of the magazine 17, the remainder of the rear wall of the magazine being covered by a removable retaining plate 19. A solenoid and mechanism housing 2% projects rearwardly from the magazine 17 and breech block 18 and houses an annular cylindrical configurated solenoid coil 21 in the rear portion thereof having an axially reciprocative core or plunger 22. and a rearwardly disposed fixed core portion 23. The fixed core portion 23 has a forwardly opening axial bore 24 which houses a stationary guide rod 25 which is surrounded by a main spring 26, both of which project into a bore 27 in the movable solenoid plunger 22. The solenoid plunger 22 terminates in its forward end in a yoke 28 fixed to the plunger by a retaining pin and having a stop surface in communication with the bore 27 against which the forward end of the main spring 26 bears to continuously urge the plunger 22 to its forwardmost position.

The gun is provided with means for automatically indexing the magazine 1'] as an incident to priming of the gun to fire so that the gun can operate with rapidfire timing. To this end, the rotary magazine 17, which in the specific example herein illustrated is provided with twenty-one cartridge chambers 29 arranged on a circular path concentric with the axis of the pivot pin 16, is designed to be turned by one magazine chamber increment with respect to the gun barrel each time the solenoid plunger 22 is retracted rearwardly by energizeration of the solenoid coil 21. This is accomplished by means of a reciprocative slide member in the form of an indexing pawl 30 of angular configuration pivoted by the connector pin 31 to the yoke 23 and having a downwardly inclined arm 32 and a forwardly, substantially horizontally projecting working arm- 33 terminating adjacent its forward end in an upwardly projecting indexing lug or nose 34. The forward portion of the working arm 33 of the indexing pawl 3% lies immediately below the magazine 17 and is continuously biased upwardly toward the magazine periphery by a spring retaining slide block 35 and spring 36, the slide block 35 interfitting with a correspondingly shaped recess 3'7 in the lower edge of the indexing pawl arm 33 and slidably supported in a guideway 38 in the lower portion of the receiver block 14. The indexing lug 34 on the pawl 3i coacts with an indexing track 39 on the cylindrical periphery iii of the magazine 17, illustrated more clearly in FIGURES 7 and 9. The indexing track 39 is con tinuous and of generally sawtooth shape by uniform increments, with each sawtooth section corresponding to an increment of rotary advance of the magazine 17 suflicient to shift a next adjacent successive cartridge chamber 29 into registry with the bore of the gun barrel 13.

Referring to FIGURE 9 illustrating the pattern of the indexing track 39, it will be observed that the indexing track has a fore and aft or axial leg 41 for each firing position of the magazine and an inclined leg 42 connecting the forward end of one axial leg 41 with the rearrnost end of the next adjacent axial leg 41, the bottom surface of each axial leg 41 having an intermediate ramp portion 43 which rises in a forwardly progressing relation from a deep rearmost region 44 to a point spaced from the forward end of the magazine a; distance slightly greater than the fore and aft length ofthe indexing lug'34 and terminates in a vertical shoulder 4-6 to provide a deep well 45 adjacent the forward end of the magazine. Each inclined leg 4-2 has an intermediate ramp 47 which rises from the level of the deep well d5 at the forward end of each axial leg 41 to a higher level where the base of each inclined leg 42 joins the deep rearmost region 4 of the next adjacent axial leg 41. Consequently, as the indexing lug'adjacent the forward end of the pawl 3t; reciprocates forwardly and rearwardly, it will ride on the forward'st-roke through one of the axial legs 41 up the intermediate ramp 43 of the axial leg and drop into the well 45' at the forward end of the axial leg 41, sothat on the rearward stroke of the indexing lug 34, the lug will be prevented from returning through the axial leg 41 by the shoulder as at the forward end of the ramp 43 and will be retained in the inclined leg 42, thus imparting appropriate rotary movement to the magazine 17 to shift the next adjacent cartridge chamber 29 into registry with the bore of the gun barrel 13. 7

It will be appreciated that as electric current is supplied to the solenoid coil 21, the magnetic field thus ration about its pivot pin 16.

created will draw the solenoid plunger 22 rearwardly against the force of the main spring 26 to the primed position, during which rearward or priming stroke of the solenoid plunger 22, the indexing pawl 36 will-be carried rearwardly, indexing the magazine 17 to bring the next adjacent cartridge chamber 29 into alignment with the bore of the barrel 13 through the above-described movement of the indexing log 34 through the inclined leg 42 of the indexing track 39. When the electrical current firing pin to fire the cartridge in the cartridge chamber 29 aligned with the bore of the barrel 13.

The selector shaft 5t may be rotated about 180 to shift the pointer Sll to the LOAD position and condition the machine gun to reload the magazine 17. in this position of the selector shaft 3%, the surface 55 of the selector shaft is spaced downwardly at a lower level than that occupied by the surface 53 in the PTRE posi tion, to abut the upper surface 57 of the indexing pawl nose 52 and force the indexing pawl downwardly against the bias of the spring 36 so as to withdraw the indexing lug 34 from the indexing track 39. This disposition of the selector shaft Stl also positions the surface in engagement with the forward vertical surfaceSS of the indexing pawl to shift the indexing pawl r'earwardly. This releases the indexing lug 34 from the indexing track of the magazine and frees the magazine for manual re- A hood 59 which normally encases the barrel 13, magazine 17, and the periphery of the retaining plate 1%, is releasably held in encasing position by abutment in its lower region with the front of the receiver block 14 and by a spring biased retaining pin, indicated at 69, supported for axial movement in the retaining plate 19 and projectable through accommodating apertures in the hood 59. When the selector shaft dd has been adjusted to LOAD position and the retaining pin 69 is manually depressed, the hood 59 and retaining plate 19 may then be removed exposing the magazine 117 for reloading of the cartridge chambers 29.

To facilitate ejection of the empty cartridge shells from the cartridge chambers 29, a manual manipulator plungor 61 is supported for axial movement on an arm 62. ex-

supply to the solenoid coil 21 is terminated, the magnetic field collapses and the solenoid plunger 22 is rapidly pr jected forwardly by the main spring 26, bringing the forwardmost end of the yoke 23 sharply against the firing pin 48, slidably supported in the breech block 18 and biased away from the magazine by the firing pin spring 49, into firing relation with the cartridge in the cartridge chamber 29 aligned with the barrel.

A manually operable selector for'conditioning the inachine gun in *iRE and LOAD conditions is provided, includin" a transverse rotatable selector. shaft 50 supported in the lower portion of the receiver block 1 3 and having an exposed knob and pointer 51 as revealed in FIGURE 7 of the drawing. This selector shaft 59 is designed to coact with the forward end portion of the tending radially from the manipulating knob of the pivot pin 16 journaled in the receiver block 1d, the arm 62 being disposed so as to align the plunger 61 with one of the cartridge chambers 24}. The plunger 61 is normally re-' siliently retained by a suitable spring clip or the like at a retracted position wherein the rear end of the plunger 6? is forward of the front surface of the magazine 17 and is manually reciprocative to project the rear portion of the plunger 61 into the cartridge chamber 29 aligned thereindexing pawl 30 having a forwardly projecting nose 52 thereon, the shaft, as more clearly revealed in FIGURE 10, having recesses cut therein aligned with the path of movement of the indexing pawl 30 to provide right angularly related stop surface 53, which in the embodiment herein illustrated is located on a radii of the selector shaft 55 a stop surface 54 at right angles to the surface 54- and an arcuate surface 55 extending between the outer ends of the surfaces 53 and 54 and following the circumference of the selector shaft 5%. In the FIRE position of the selector shaft'S-tl, the stop surfaces 53 and 54 of the selector shaft 5t? are disposed at the nine oclock and twelve oclock positions as viewed in FIGURES 4 and 10 and are so disposed relative to the upwardly facing hearing surface 57 of the indexing pawl nose 52 and the forwardvertical bearingsurface 58 of the indexing pawl to permit the spring as to urge the free end of the working indexing pawl leg 33 upwardly to a sufficient elevation to project into the indexing track 39 of the magazine 17 and to permit the indexing'pawl .138 to be shifted forwardly a suificient distance under the force of the main spring 25 so that the forward end of the yoke 28, serving as a hammer, can strike the firing pin 48 and causethe with to eject the empty cartridges from the chamber.

A suitable barrel locking pin 63 is also supported in the receiver block 14 to normally extend through a recess cut in the exterior surface of the barrel 13 at the rear end thereof, the pin 63 having a cutawayportion which may be disposed in registry with the barrel upon rotation of the pin 63 to permit the barrel to be Withdrawn from the re ceiver block 14. V

The machine gun is provided with a base 64. This base 64 has a transverse dovetail groove 65 which opens downwardly through the bottomsurface thereof andis" adapted to receive the dovetail tongue 66 of a mounting plate assembly 67 adapted to be permanently installed on the hood of the carrier vehicle. The mounting plate as sembly 67 is constructed so as to provide limited elevational adjustment of the machine gun, and to this end includes an upper plate 68 and a lower plate 69 coupled together by the hinge joint 70 at the forward end thereof, the lower plate 69 being securely fixed to the hood of the vehicle as by a clamping plate 71 and mounting screws extending through the lower plate 69, clamping plate 71 and the automobile hood. These components are fixed in such a position that the machine gun will shoot straight ahead of the automobile. A solenooid coil 72 is mount ed on a supporting plate or arm 73 suspended below the the'upper plate 68 of the mounting plate assembly 67 by means of a cylinder lock '76 having a bolt which projects below the lower surface of the base 64 into an accommodating groove or keeper aperture in the upper surface of the upper mounting plate 63 to lock the base 64 against displacement along the dovetail tongue 66.

The machine gun it) is fired and adjusted in elevation by suitable remote control means having manually operative components located within the cab of the vehicle, an example of which is illustrated in FIGURES l and 3. Referring to the schematic electrical control circuit illustrated in FIGURE 3, the firing solenoid coil 21 has one terminal connected to ground, depicted by the lead 77 to the negative side of the automobile battery, and the other terminal of the solenoid coil 21 is connected through the push button switch 31 located on the dashboard 12 of the automobile adjacent the mounting base for the machine gun, and thence through a key controlled master switch 78 located on the dashboard l2 and lead 7Q to the other terminal of the automobile battery. The key controlled master switch 7 S is preferably of the type having a center off position and left and right positions, and may, for example, have one movable contact arm 84} cooperating with left and right stationary contacts 81 and 82 both connected through lead 33 with the push button 11, and a second movable contact arm 84 cooperating with a left stationary contact 35 connected through lead 86 to the solenoid coil 72 which, when energized, draws the upper plate 68 of the mounting plate assembly 67 downwardly to elevate the gun to shoot in a substantially horizontal position.

Thus it will be seen that if the key controlled master switch 7s is turned from the center oh. position to the right, the circuit for the firing solenoid coil 21 will be armed so that depression of the push button firing switch 11 will energize the solenoid coil 21. However, the eleva tion adjusting coil 72 is deenergized in this condition of the master switch 78. When the master switch 78 is shifted to the left position, the movable contact arm 84) engages the stationary contact 81 to arm the energizing circuit of the firing solenoid coil 21, and the movable contact arm 34 engages the stationary contact 85 to energize the elevation adjusting coil 72 to thereby elevate the gun barrel L3 to the horizontal position.

A jack socket 557 bypassing the push button switch 11 may be conveniently located on the hood of the automobile adjacent the mounting base for the machine gun, so that the operator can insert a jack plug, indicated at 88, of an extension cord 8% in the jack socket 87 and by manipulation of a push button 89A on the other end of the extension cord 82 fire the machine gun from a position externally of the automobile. Such an arrangement is convenient, for example, when an officer operating the vehicle carrying the machine gun has stopped a suspect automobile and has to get out of his vehicle and walk up to the car ahead. In such a case the ofiicer can maintain firing control of the machine gun by inserting the jack plug 88 in the jack socket 87 and carrying the push but ton end of the extension cord with him to the suspect car.

If desired, a handle for transporting the machine gun away from the carrying vehicle can also be provided, an example of which is illustrated in FIGURE 8 and is designated by the reference character 9h. This handle will have a dovetail tongue 91 similar in configuration to the dovetail tongue as onto which the base 64 of the machine gun Would be slipped after removal of the machine gun from the mounting plate assembly 67 on the hood of the automobile, and a trigger 92 would be provided in the handle assembly providing a push button type of switch similar to the push button switch 89A on the end of the extension cord 89, the handle assembly 96 being likewise provided with an extension cord 93 having a jack plug 94 on the end thereof for insertion in the jack socket 87.

It is apparent that various modifications may be made in the present invention within the spirit and scope of the 6v invention, and it is desired, therefore, that only such limitations be'placed on the invention as are imposed by the prior art and set forth in the appended claims.

Iclaim:

1. An electrically activated rapid-fire gun comprising a gun barrel, a rotary magazine supported for rotation about its center behind the gun barrel for successive registration of a plurality of cartridge chambers with the gun barrel, said magazine having a cylindrical periphery including an indexing track extending continuously about said periphery, a reciprocative slide member having a retracting stroke and an advancing stroke and including an indexing nose coacting with said indexing track for rotating the magazine to successively register the cartridge chambers with the gun barrel during the retracting stroke of said slide member, electrical solenoid means supported rearwardly of said magazine and having a reciprocative plunger connected to said slide member for withdrawing the slide member through its retracting stroke upon electrical energization of the solenoid, spring means for projecting the solenoid plunger in a direction to shift the slide member through its advancing stroke upon deenergization of the solenoid means, and firing pin means responsive to movement of said plunger during the advancing stroke of said slide member to fire a cartridge in the cartridge chamber aligned with the gun barrel.

2. An electric machine gun comprising a gun barrel, a rotary cylindrical magazine having a plurality of cartridge chambers therein located on a circular path concentric with the center of the magazine, means supporting said magazine for rotation about its center for successive registration of the cartridge chambers with the gun barrel, said magazine having an indexing track extending continuously about its periphery, a reciprocative slide member for indexing the cartridge chambers into reg-istration with the gun barrel in succession including an indexing lug adjacent the forward end thereof projecting into said indexing track, an electrical solenoid including a solenoid coil supported rearwardly of the magazine and a reciprocative plunger connected to said slide member for withdraw-ing the slide member through an arming stroke upon electrical energization of the solenoid, spring means for projecting said solenoid plunger and said slide member toward the magazine through a firing stroke upon deenergization of the solenoid coil, striking means carried by said plunger, and firing pin means disposed in the path of said striking means to be struck thereby and fire a cartridge in the cartridge chamber aligned with the gun barrel during the firing stroke of said plunger, said indexing track being shaped to coact with said indexing lug in rotating the magazine through increments to successively register cartridge chambers with the gun barrel during the arming stroke of said plunger and slide member.

3. An electric machine gun adapted to be mounted at an exterior location on an automotive vehicle or the like, the machine gun comprising a gun barrel having a breech and a muzzle, a rotary magazine having a plurality of cartridge chambers supported for rotation about its center behind the gun barrel for successive registration of the cartridge chambers with the breech of the gun barrel, said magazine having a cylindrical periphery including an indexing track extending continuously about said periphery, a reciprocative indexing pawl slidable through a retracting stroke and an advancing stroke and including an indexing lug coacting with said indexing track for rotating the magazine to successively register the cartridge chambers with the gun barrel during the retracting stroke of said indexing pawl, electrical solenoid means supported rearwardly of said magazine and having a reciprocative plunger connected to said indexing pawl for withdrawing the indexing pawl through its retracting stroke upon electrical energization of the solenoid, spring means for projectingthe solenoid plunger in a direction to'shift the indexing pawl through its advancing stroke upon deenergization of the solenoid means, firing pin means responsive to movement of said plunger during the advancing stroke of said indexing pawl to fire a cartridge in the cartridge chamber aligned with the gun barrel, mounting base means supporting the machine gun for movement in elevation, manually operable switch means supported within the vehicle for making and breaking an electrical supply circuit to said solenoid means, means normally urging said mounting base means to aim said gun barrel along a normal axis inclined downwardly from the horizontal, elevation adjusting solenoid means intercou-pled with said mounting base means for shifting the machine gun to aim said gun barrel along an axis inclined upwardly from said normal axis upon energization thereof, and remote control switch means for selectively energizing said elevation adjusting solenoid means. l 7

4. An electric machine gun adapted to be mounted at an exterior location on an automotive vehicle or the like, the machine gun comprising a gun barrel, a rotary magazine having a plurality of cartridge chambers supported for rotation about its center behind the gun barrel for successive registration of the cartridge chambers with the gun barrel, said magazine having a cylindrical periphery including an indexing track extending continuously about said periphery, a reciprocative slide member having a retracting stroke and an advancing stroke and im eluding an indexing lug coac-ting with said indexing track for rotating the magazine to successively register cartridge chambers with the gun barrel during the retracting stroke of said slide member, electrical solenoid means supported rearwardly of said magazine and having a reciprocative plunger connected, to said slide member for withdrawing the slide structure through. its retracting stroke upon electrical energization of the solenoid, spring means for projecting the solenoid plunger in a direction to shift the slide memberthrough its advancing stroke upon deenergization of the solenoid means, firing pin means responsive to movement of said plunger during the advancing stroke of said slide member to fire a cartridge in the cartridge chamber'aligned with the gun barrel, and an energizing circuit for said solenoid means including a source of voltage and a push, button switch adapted to be supported withinthe vehicle for making and breaking the energizing circuit to said solenoid means.

5. An electric machine gun adapted to be mounted at an exterior location on an automotive vehicle or the like, the machine gun comprising a gun barrel, a rotary cylindrical magazine having a plurality of cartridge chambers therein located on a circular path. concentric with the center of the magazine, means supporting said magazine for rotation about its center for successive registration of the cartridge chambers with the gun barrel, said magazine having an indexing track extending continuously about its periphery, a reciprocative indexing pawl for indexing the cartridge chambers into registration with the gun barrel in successionlincluding an indexing lug adjacent the forward end thereof projecting into said indexing track, an electrical solenoid including a solenoid coil supported rearwardly of the magazine and a reciprocative plunger connected to said indexing pawl for withdrawing the indexing pawl through an arming stroke upon electrical energization of the solenoid, spring means for projecting said solenoid plunger and said indexing pawl toward the magazine through a firing stroke upon deenergization of the solenoid coil, striking means carried by said plunger, firing pin means disposed in the path of said striking means to be struck thereby and fire a cartridge in the cartridge chamber aligned with the gun barrel during the firing stroke of said plunger, said indexing track being shaped to coaot with saidlindexing lug in rotating the magazinethrough increments to successively register cartridgechambers with the gun barrel during the arming stroke of said plunger and indexing pawl, and an energizing circuit for said solenoid means including a source of voltage and a pushbutton switch adapted to be supported within the vehicle for making and breaking the energizing circuit to said solenoid means, said energizing circuitincluding a branch circuit by-passing said push button switch having a jack socket therein to receive a jack plug of an extension cord terminating in a switch to permit energization of said solenoid means by activation of said last-mentioned switch when the jack plug is inserted in the jack socket.

6. The combination recited in claim 1, wherein said indexing track is a generally sawtooth shaped track with each sawtooth section corresponding to an increment of rotary advance with the magazine to register a cartridge chamber thereof with the gun barrel, each of the sawtooth sections including an axial leg extending in a direction parallel to the axis of the gun barrel and the axis of rotation of the magazine and an inclined leg extending from the forward end portion of one axial leg to the rearward end portion of a next adjacent axial leg, said axial legs having a forwardly rising ramp in the base thereof terminating in a shoulder disposed to prevent rearward movement of said indexing lug through the axial legs from the forwardmost end portions of the axial legs to cause the indexing nose to be drawn through the connecting inclined leg when the indexing nose is drawn rearwardly from a forwardniost position in an axial leg by the retracting stroke of said slide member.

1 7. The combination recited in claim Z, wherein said indexing track is a generally sawtooth shaped track with each sawtooth section corresponding to an increment of rotary advance with the magazine to register a cartridge chamber thereof with the gun barrel, each of the sawtooth sections including an axial leg extending in a direction parallel to the axis of ti e gun barrel and the axis of rotation ofthe magazine and an inclined leg extending from the forward end portion of one axiallleg to the rearward end portion of a next adjacent axial leg, said axial legshaving a forwardly rising ramp in the base thereof terminating in a shoulder disposed to prevent rearward movement of said indexing lug through the axial legs from the forwardmost end portions of the axial legs to cause the indexing lug to be drawn through the connecting inclined leg when the lug is drawn rearwardly from a forwardmost position in an axial leg by the arming stroke of said plunger. a

8. The combination recited in claim 1, wherein said slide member projectslforwardly from said plunger beneath said magazine and terminates in a free forward end portion having a forwardly projecting integral nose bounded by an upwardly facing substantially horizontal surface and a vertical end wall joining said horizontal surface to form right angular follower surfaces, said indexing nose rising from said forward end portion of said slide member LO project, into said indexing track, spring means bearing against said slide member to urge said indexing nose into said track and a'selector shaft rotatable on a horizontal transverse axis having a recess disposed in one angular position of the selector shaft to receive said forwardly projecting nose and permit a range of movement of said slide member during the advancing stroke thereof to permit the plunger to activate the firing pin means to fire a cartridge and having surfaces disposed in another angular position of the selector shaft to engage said follower surfaces and force the free end portion or" said slide member downwardly and rearwardly to fully withdraw said indexing nose from said indexing track.

9. The combination recited in claim 2, wherein said slide member projects forwardly from said plunger beneath said magazine and terminate-sin a free forward end portion having a forwardly projecting integral nose bounded by an upwardly facing substantially horizontal surfs e and a vertical end Wall joining said horizontal surface to form right angular follower surfaces, said indexing lug rising from said forward end portion of said slide member to project into said indexing track, spring means bearing against said slide member to urge said indexing lug into said track and a selector shaft rotatable on a horizontal transverse axis having a recess disposed in one angular position of the selector shaft to receive said nose and permit a range of movement of said slide member during the firing stroke thereof to permit the 1G plunger to activate the firing pin means to fire a cartridge and having surfaces disposed in another angular position of the selector shaft to engage said follower surfaces and force the free end portion of said slide member downwardiy and rearwardly to fully withdraw said indexing lug from said indexing track.

No references cited. 

1. AN ELECTRICALLY ACTIVATED RAPID-FIRE GUN COMPRISING A GUN BARREL, A ROTARY MAGAZINE SUPPORTED FOR ROTATION ABOUT ITS CENTER BEHIND THE GUN BARREL FOR SUCCESSIVE REGISTRATION OF A PLURALITY OF CARTRIDGE CHAMBERS WITH THE GUN BARREL, SAID MAGAZINE HAVING A CYLINDRICAL PERIPHERY INCLUDING AN INDEXING TRACK EXTENDING CONTINUOUSLY ABOUT SAID PERIPHERY, A RECIPROCATIVE SLIDE MEMBER HAVING A RETRACTING STROKE AND AN ADVANCING STROKE AND INCLUDING AN INDEXING NOSE COACTING WITH SAID INDEXING TRACK FOR ROTATING THE MAGAZINE TO SUCCESSIVELY REGISTER THE CARTRIDGE CHAMBERS WITH THE GUN BARREL DURING THE RETRACTING STROKE OF SAID SLIDE MEMBER, ELECTRICAL SOLENOID MEANS SUPPORTED REARWARDLY OF SAID MAGAZINE AND HAVING A RECIPROCATIVE PLUNGER CONNECTED TO SAID SLIDE MEMBER FOR WITHDRAWING THE SLIDE MEMBER THROUGH ITS RETRACTING STROKE UPON ELECTRICAL ENERGIZATION OF THE SOLENOID, SPRING MEANS FOR PROJECTING THE SOLENOID PLUNGER IN A DIRECTION TO SHIFT THE SLIDE MEMBER THROUGH ITS ADVANCING STROKE UPON DEENERGIZATION OF THE SOLENOID MEANS, AND FIRING PIN MEANS RESPONSIVE TO MOVEMENT OF SAID PLUNGER DURING THE ADVANCING STROKE OF SAID SLIDE MEMBER TO FIRE A CARTRIDGE IN THE CARTRIDGE CHAMBER ALIGNED WITH THE GUN BARREL. 